TLV VS3-E, VS3-P, VS3-EP Instruction Manual
172-65528A-01 (VS3-E/VS3-P/VS3-EP) 19 January 2021
Automatic Air Vent
(Clean Air Vent)
VS3-E / VS3-P / VS3-EP
Manufacturer
881 Nagasuna, Noguchi, Kakogawa, Hyogo, 675-8511, Japan
Tel: [81]-(0)79-422-1122 Fax: [81]-(0)79-422-0112
Copyright © 2021 by TLV Co., Ltd. All rights reserved
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Contents
Introduction ....................................................................... 1
Safety Considerations ....................................................... 2
Features ............................................................................ 4
Operation .......................................................................... 4
Specifications .................................................................... 5
Configuration ..................................................................... 5
Installation ......................................................................... 6
Maintenance ...................................................................... 7
Disassembly/Reassembly ................................................. 8
Troubleshooting .............................................................. 10
TLV EXPRESS LIMITED WARRANTY ............................. 11
Option (2-piece Clamp for Bolts and Nuts) ..................... 13
Introduction
Thank you for purchasing the TLV automatic air vent (clean air vent).
This product has been thoroughly inspected before being shipped from the
factory. When the product is delivered, before doing anything else, check the
specifications and external appearance to make sure nothing is out of the
ordinary. Also be sure to read this manual carefully before use and follow the
instructions to be sure of using the product properly.
The automatic air vent (clean air vent) is designed to automatically discharge/
release air trapped in water-carrying pipes during water transport. It also
automatically discharges the air that was entrained in the water during
operation and has subsequently been separated and collected in specific
locations in the piping.
For products with special order specifications or options, if detailed
instructions for the special order specifications or options are not contained in
this manual, please contact TLV for full details.
This instruction manual is intended for use with the model(s) listed on the
front cover. It is necessary not only for installation but for subsequent
maintenance, disassembly/reassembly and troubleshooting. Please keep it in
a safe place for future reference.
172-65528A-01 (VS3-E/VS3-P/VS3-EP) 19 Jan 2021
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Indicates a DANGER, WARNING or CAUTION item.
DANGER
Indicates an urgent situation which poses a threat of death or
serious injury
WARNING
Indicates that there is a potential threat of death or serious injury
CAUTION
Indicates that there is a possibility of injury or equipment /
product damage
WARNING
DO NOT use for toxic, flammable or otherwise hazardous fluids.
This product is an air vent that discharges air from water piping
systems. Use only for water and/or air. This product is for intended
use only. Improper use may result in such hazards as damage to the
product or malfunctions that may lead to serious accidents.
NEVER apply direct heat to the float.
The float may explode due to increased internal pressure, causing
accidents leading to serious injury or damage to property and
equipment.
CAUTION
Install properly and DO NOT use this product outside the
recommended operating pressure, temperature and other
specification ranges.
Improper use may result in such hazards as damage to the product
or malfunctions that may lead to serious accidents. Local regulations
may restrict the use of this product to below the conditions quoted.
DO NOT use this product in excess of the maximum operating
pressure differential.
Such use could make discharge impossible (blocked).
Take measures to prevent people from coming into direct
contact with product outlets.
Failure to do so may result in burns or other injury from the
discharge of fluids.
Safety Considerations
Read this section carefully before use and be sure to follow the
instructions.
Installation, inspection, maintenance, repairs, disassembly, adjustment
and valve opening/closing should be carried out only by trained
maintenance personnel.
The precautions listed in this manual are designed to ensure safety and
prevent equipment damage and personal injury. For situations that may
occur as a result of erroneous handling, three different types of cautionary
items are used to indicate the degree of urgency and the scale of potential
damage and danger: DANGER, WARNING and CAUTION.
The three types of cautionary items above are very important for safety: be
sure to observe all of them as they relate to installation, use, maintenance,
and repair. Furthermore, TLV accepts no responsibility for any accidents
or damage occurring as a result of failure to observe these precautions.
Symbols
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Continued on the next page
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CAUTION
When disassembling or removing the product, wait until the
internal pressure equals atmospheric pressure and the surface
of the product has cooled to room temperature.
Disassembling or removing the product when it is hot or under
pressure may lead to discharge of fluids, causing burns, other
injuries or damage.
Be sure to use only the recommended components when repairing
the product, and NEVER attempt to modify the product in any way.
Failure to observe these precautions may result in damage to the
product and burns or other injury due to malfunction or the discharge
of fluids.
Use only under conditions in which no freeze-up will occur.
Freezing may damage the product, leading to fluid discharge, which
may cause burns or other injury.
Use only under conditions in which no water hammer will occur.
The impact of water hammer may damage the product, leading to
fluid discharge, which may cause burns or other injury.
172-65528A-01 (VS3-E/VS3-P/VS3-EP) 19 Jan 2021
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Features
1.
When water starts to flow through the
piping, air trapped within the piping is
pushed along by the water pressure and
enters the air vent. At first, because the
float is positioned in the lower part of the
air vent, the valve is fully open and the air
passes through the valve seat and is
discharged rapidly through the vent.
2.
When the air has been discharged and
water begins to enter the air vent, the
float starts to rise due to buoyancy. This
pushes it upwards against the valve
opening, thus closing the air vent.
If there is a rapid rise in water level
(caused by rapidly opening a shut-off
valve, etc.), a small amount of water may
leak with discharged air immediately
before the air vent closes.
3.
When more air is trapped in the air vent
due to the inflow of water having closed
the valve, the water level in the air vent is
forced down and consequently the level of
the float falls, opening the valve. Air can
now again escape through the air vent,
and as it does so the level of the water
rises, pushing the float upwards again to
close the valve. In this way the VS3 series
automatically adjusting air vents
constantly respond to the flow of air.
4.
When draining the piping, the air vent
automatically opens to introduce air and
remove water more easily (preventing a
vacuum from forming in the piping).
Valve seat
Valve seat
Valve seat
Air
Air
Water
Water
1. Precision-ground float and 3-point seating provide the tightest seal.
2. All stainless steel construction provides outstanding corrosion resistance.
3. The air vent has no hinges or levers: the only moving part is the polished float,
which eliminates concentrated wear and provides long service life.
4. Simple construction with few parts allows for easy maintenance.
5. The air vent is small and light.
Operation
172-65528A-01 (VS3-E/VS3-P/VS3-EP) 19 Jan 2021
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